96 MESOZOA 



Schulze. It has the appearance of a large, flattened, ciliated 

 Amoeba (l'5-3 mm. in diameter), but is distinguished by its 

 structure. The upper surface is composed of a flattened epithe- 

 lium. The lower surface is made up of cylindrical ciliated cells, 

 which pass imperceptibly into the branched cells, embedded in 

 a hyaline matrix, which compose the middle layer of the body. 

 No distinct organs, and beyond simple fission, no mode of repro- 

 duction, have been observed. One species, T. adhaerens, is known, 

 but has never been met with in a free state. 



Salinella. ' This is another aquarium - animal, found by 

 Frenzel in the Argentine, in an artificial saline solution with 

 which he filled some aquaria. It measures '2 mm. in length, 

 and has a somewhat flattened, barrel -shaped appearance. A 

 single layer of ciliated cells bounds a central cavity opening at 

 each end. Fission, and conjugation followed by encystment, 

 have been observed. One form, S. salve, is known from salines 

 taken from Cordova. 



1 Arch. Natimj. Iviii. 1891, p. 66. 



